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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 1 |
| 7 | 1 |
| 8 | 1 |
| 9 | 1 |
| 10 | 1 |
| 11 | 2 |
| 12 | 3 |
| 13 | 4 |
| 14 | 5 |
| 15 | 6 |
| 16 | 7 |
| 17 | 8 |
| 18 | 9 |
| 19 | 8 |
| 20 | 7 |
| 21 | 6 |
| 22 | 5 |
| 23 | 4 |
| 24 | 3 |
| 25 | 2 |
| 26 | 1 |
| 27 | 1 |
| 28 | 3 |
| 29 | 6 |
| 30 | 10 |
| 31 | 15 |
| 32 | 21 |
| 33 | 28 |
| 34 | 36 |
| 35 | 45 |
| 36 | 52 |
| 37 | 57 |
| 38 | 60 |
| 39 | 61 |
| 40 | 60 |
| 41 | 57 |
| 42 | 52 |
| 43 | 45 |
| 44 | 36 |
| 45 | 28 |
| 46 | 21 |
| 47 | 15 |
| 48 | 10 |
| 49 | 6 |
| 50 | 3 |
| 51 | 1 |
| 52 | 1 |
| 53 | 4 |
| 54 | 10 |
| 55 | 20 |
| 56 | 35 |
| 57 | 56 |
| 58 | 84 |
| 59 | 120 |
| 60 | 165 |
| 61 | 216 |
| 62 | 270 |
| 63 | 324 |
| 64 | 375 |
| 65 | 420 |
| 66 | 456 |
| 67 | 480 |
| 68 | 489 |
| 69 | 480 |
| 70 | 456 |
[1,1,1,1,1,1,1,1,1,1,1,2,3,4,5,6,7,8,9,8,7,6,5,4, 3,2,1,1,3,6,10,15,21,28,36,45,52,57,60,61,60,57, 52,45,36,28,21,15,10,6,3,1,1,4,10,20,35,56,84,120, 165,216,270,324,375,420,456,480,489,480,456] |